Method for manufacturing aluminium alloys



fiTATES co TEDESCO,OE roam, ITALY, ASSIGNOR T0 soorn'ra Antonina STABILIMENTI IBIAK, or roam, ITALY, A COMPANY or ITALY.

METHOD FOR- MANUFAGTUBIING ALUMINIUM ALLDYS.

menses, No Drawing.

To all whom it may concern:

Be it known that I, ARRIGO Tnnnsco, a subject of the King of Italy, and resident of Turin, Italy, have invented certain new and useful Improvements in Methods forManufacturing Aluminium Alloys, of which? the following is a specification.

The present invention has for its object a method for the manufacture of alloys with a high aluminium percentage according to which, instead of alloying directly with the entire aluminium mass the other metals to be comprised in the alloy, an addition alloy is prepared separately, the same containing said metals in the state of an allo with a reduced amount of aluminium and t is addition alloy is thereafter associated in the required percenta e with the aluminium bath to produce the final alloy.

' Thus-the advantage is obtained that the metals to be alloyed with aluminium are in the condition of an alloy with aluminium, this enabling a better mixing of said metals throughout, the mass and giving rise to a more homogeneous final alloy having a very fine grain and higher resistance to tensile stresses.

The addition alloy may be alloyed with aluminium to variable percentages that is up to 30% of the final alloy.

it has been found that this method may be carried out with very satisfactory results for producing alloys of aluminium with zinc and copper.

W reference to such a case as an example of this invention, a separate alloy is made containing 66% of nine, 9% of copper and Specification of Letters Patent.

Patented Aug. 24;, 1920.

Application filed July 11, 1919. Serial No. 310,263.

25 2 of aluminium, this alloy being then associated with the aluminium bath to a percentage which may vary up to ofv the Final alloy.

It has been found that the final alloy obtained according to this invention has a resistance to tensile stresses, when cast, up to kg. per sq. mm. and, when rolled, up to 50 kg. per sq. mm.

Obviously percentages of added metals and of aluminium in the addition alloy may 'vary within wide ranges and the percentage ofaddition alloyin the final alloy will be accordingly varied so that this latter has the desired characters.

What I claim as my invention and desire to secure by United States Letters Patent is:

1. A method of producing a zinc-copperaluminum alloy containing a high percentage 9% of copper and 25% at aluminum; and

thereafter associating such alloy with the aluminum loath.

Signed at Turin, Italy, June 12, 1919.

annrco rnnnso 

